一起典型35 kV 开关柜复合绝缘击穿事故分析及整改措施

摘要

35 kV高压开关柜广泛应用于变电站，其可靠的工作有着至关重要的意义。针对某一220 kV变电站35 kV开关柜绝缘击穿放电事故，对事故发生，现场检查、原因分析依次进行了详细的介绍和讨论。研究表明，开关柜绝缘隔板结构设计不够完善，特定条件下的长期运行时造成的局部绝缘性能下降，是此次事故的主要原因。最后，针对事故原因提出了有效的整改措施。%35 kV HV switchgear cabinet is widely used in the substations , and its reliability has a substantial significance .An insulation breakdown of 35 kV switchgear cabinet in 220 kV substation is investigated .The accident process , field inspection and primary causes are introduced and discussed respectively .The design defects of the insulating barrier in switchgear cabi-net, and the reduction of the partial insulating performance are considered to be responsible for this accident .In the end, the rectification measures are proposed for preventing the occurrence of the same accident .